Revolving scraper of the wheel type



Jan. 3, 1933. o. w. SJOGREN ET AL REVOLVING SCRAPER OF THE WHEEL TYPE Filed 'July 20, 1952 3 Sheets-Sheet h I I BE wmWN D. U U 4 a I II VI 1 I lihuq 3 3 I 5 Q i N m Jan. 3, 1933. o. w. SJOGREN ET AL REVOLVING SCRAPER OF THE WHEEL TYPE 3 Sheets-Sheet 2 Filed July 20, 1952 Jan. 3, 1933. o. w. SJOGREN ET AL REVOLVING SCRAPER OF THE WHEEL TYPE Filed July 20, 1932 3 Sheets-Sheet 5 ltorneyg Inventors Patented Jan. 3, 1933 UNITED STATES PATENT orFrcE OSCAR W. SJOGREN, OF HUNTINGTON PARK, AND JESSE A. VAUGHN, OF LOS ANGELES, CALIFORNIA, ASSIGNORS TO KILLEFER MANUFACTURING CORPORATION, LTD OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA REVOLVING SCRAPER OF THE WHEEL TYPE Application filed July 20,

This invention relates to a revolving scraper of the wheel type, in which the scraper bowl is rotatably mounted upon a pair of lifting arms, which arms are operatively connected to a sliding draw bar for elevating and simultaneously rearwardly tilting the scraper bowl from the loading to the dragging or carrying positions when the desired load has been accumulated.

An object of this invention is to provide a revolving scraper, of the wheel type, with a pair of lifting arms to which the scraper bowl is journalled at a point spaced from the point at which the lifting arms are pivotally connected to the frame of the imfor lifting and simultaneously rearwardly tilting the bowl when the desired load has been accumulated.

A further object is to provide the lifting arms with movable stop means for engaging suitable stops carried by the scraper bowl I and also for providing actuating means to disengage the movable stop means from engagement with the bowl stops to free the bowl for rotation.

A further object is to provide a releasable locking means for locking the sliding draw-bar to retain the scraper bowl in either a scraping, dragging or carrying position.

A further object is to provide areleasable locking means operable for locking the sliding draw-bar for retaining the scraper bowl in either a scraping or a dragging position, and also operable for releasing said sliding draw-bar for elevating and fioatingly retalning the scraper bowl in a carrying position.

A further object is to provide a scraper which may be drawn over levees or embankments without cutting through or breaking down such levees or embankments.

A further object is to provide a scraper which may be used for the building of levees, breaks or embankments.

A further object is to provide a scraper in which the scraper bowl will be simultaneously rearwardly rotated during the lifting of the bowl.

1932. Serial No. 623,516.

A further object is to provide a scraper in which the bowl may be floatingly retained in a carrying position.

A further object is to provide. a scraper in which the'cutting blade will be elevated from a cutting an le to a non-cutting angle simultaneously with the elevating of the bowl.

Other objects and advantages of the invention will become apparent as the nature of the same is more fully understood from the following description and accompanying drawings, wherein is set forth what is nowconsidered to be a preferred embodiment. It should be understood, however, that this particular embodiment of the invention is chosen principally for the purpose of exemplification, and that variations therefrom in details of construction or arrangement of parts may accordingly be effected and yet remain within the spirit and scope of the invention as the same is set forth in the appended claims.

In the drawings:

Figure 1 is a plan view of the invention;

Figure 2 is aside elevation of Figure 1 and illustrates the implement in dragging position;

Figure 3 is a view similar to Figure 2, with the exception that the implementis illustrated in the scraping or loading'position;

Figure 4 is a view similar to Figures 2 and 3, excepting that the implement has been elevated to its full carrying position;

Figure 5 is an enlarged fragmental'view partially in section of the removable bowl stop;

Figure 6 is a sectional view taken substantially in the plane of lines 66 of Figure 5.

A preferred construction of the invention, as disclosed in the drawings, includes a main frame 1 supported at the rear by traction wheels 2 journalled upon the transverse axle shaft 3, which shaft is secured to the frame by bearings 4: and U-bolts 5. A cross-member 6 is provided for connecting the rear ends of the frame, upon which member wheel cleaners 7 are mounted for removing mud or other deleterious matter from the tread of the ed in the front end of the frame and an antivalso be arranged to lock the bowl in t friction roller 9 may be provided for reducing the sliding friction of the draw-bar. The anti-friction roller 9 may be mounted upon the frame as by the bearing bracket 10. A pair of lifting arms 1'1, are pivotally mounted upon the frame, as a 12, and each arm may be provided with a depending bracket 13. An operating mechanism is provided for transmitting the motion of the sliding draw-bar 8 to brackets 13 of the lifting arms 11, which mechanism may include a rock shaft 12 journaled upon the frame by means of bearings 15. An actuating lever is may be suitably secured upon shaft 14 by welding, as at 17. A connecting link 18, which link is adj ustahle as to length by the right and left-hand turn buckle 19, operatively connects the rear end of the sliding draw-. -ar S to the free end of lever 16, whereby the sliding motion of the draw-bar 8 is transmitted to lever 16, which in turn causes shaft 14 to rock.

A crank-arm 20 is provided at each end of rock-shaft 14, and each arm 20 is operatively connected to the end bracket 13 of the adj acent lifting arm 11, as by means of a pair of links 21. By means of the mechanism just described, it will be observed that as the sliding draw-bar is moved in or out of the frame, the forward ends of the lifting arms will be lowered or raised.

A scraper bowl 22 is rotatably mounted between the lifting arms, as by means of trunnions 23 and bearings 24, and the bowl is provided at each end with a loading stop bracket 25 and spreading stop bracket 26. The bowl is also provided with a cutting blade 27. In other respects the bowl is of ordinary design.

A lockin and releasing means may be provided. It is preferable to arrange the locking and releasing means to normally retain the scraper bowl against rotation, but which may be actuated to release the bowl in order that the bowl may roll to spread or dump the accumulated load. The locking means may he spreading position.

The locking and releasing means may include a release lever 28 suitably secured to the control shaft 29, which shaft may be journaled transversely of the lifting arms 11 by means of brackets 30 and journals 31. Crank arms 32 may be formed integral with or suitably secured to each end of shaft 29. A bearing bracket 33 may be suitably mounted adjacent the forwa d end of each lifting arm 11, as by means of bolts 34: and 35, and may be provided with a bearing 36. A swinging latch 37 may be journaled in the bearing 36 of each bracket 33 by means of shaft 38, which shaft may be formed integral with or suitably secured to the swinging latch member 37. Any suitable means may be provided for rotatably maintaining shaft 38 within the bearing 36, such as washer 39 and nut 40.

Each bearing bracket 37 may be provided with a projecting stop 41 in order to limit the swinging movement of latch 37. Adjacent the lower end of each swinging latch 37 there is provided a laterally projecting stop lug 42, adapted when latch 37 is swung into locking position to be engaged by and thus hold the bowl stops 25 or 26 to retain the bowl in either its loading or dumping positions.

It is preferable to so arrange the stop lugs l2 that the thrust of the bowl stops 25 thereagainst will tend to rotate the swinging latch 37 to remove stop lugs A2 from locking engagement with the said bowl stops 25, whereby when the means for retaining the swinging latch in locking position are released the lock will be self-releasing, thus rendering the action of releasing the locking means easy and positive.

The means for retaining the swinging latch in looking position may preferably include a toggle lock formed by pivotally connecting the upper end of each swinging latch 37 to the adjacent crank arm 32 by means of toggle links 43. A stop bracket 44 may be suitably mounted upon each bracket 30 and arranged to stop the upward movement of the crank arms 32 when said crank arms have moved slightly above the center line passing through the center of shaft 29 and the points of pivotal connection of the toggle links and the swinging latch members 37. By this arrangement the thrust of bowl stops 25 against stop lugs 42 will tend to rotate the swinging latch members in a direction to force, through toggle links 4, the crank arms more securely against the stop brackets 4%. To release the bowl stops from stop lugs 4-2 requires only the disrupting of the toggle lock, which is easily accomplished by swinging forwardly the release lever 28 by means of rope 45. As will be observed, as soon as the crank arms 32 are moved below the center line above referred to, the thrust of the bowl stops upon the stop lugs will act to swing the latch members 37 until the bowl stops will ride clear of the stop lugs 4-2;-thus, the unlocking of the bowl, once the toggle lock has been broken is substantially self-acting. It is desirable to swing the latch members 37 back into lockin g position and reestablish the toggle locks as soon as the previously engaged bowl stops have passed by the stop lugs, and for this purpose a spring 46 may be provided at any appropriate location, but preferably as illustrated as acting between the release lever 23 and the pivotal mounting for the lifting arms 11.

A latch means l7 may be provided to lock the sliding draw-bar 8 in either its retracted or extended position, or both, which means may include a bolt 48 slidably mounted in bracket 49 adapted to enter either of the notches 50 and 51 formed in the upper surface of the sliding draw-bar. A control lever 52 is bifurcated at 53 to straddle bolt 48 and to be pivotally connected thereto by means of pivot pin 54, and the control handle is operatively connected to the bracket 49 by means of a pair of pivoted links 55. A spring 56 may be provided for yieldinglyurging bolt 48 into either of notches 50 and 51, which spring 56 may act between the control lever 52 and a suitable bracket 57 suitably mounted upon the implement frame.

A pair of coil springs 58 may be provided for yieldingly retaining the sliding draw-bar in its retracted position and thus the implement in the digging or loading position. One end of each spring may be connected to the rear end of the sliding draw-bar by means of clevis 59, while the opposite end of each spring may be attached to the frame by means of suitable brackets 60.

The operation of the scraper is substan tially as follows: A tractor or other suitable means of draft (not shown) may be connected to the sliding draw-bar 8. At the time of attac hing the draft means the implement would normally be in the carrying position, as illustrated in Fig. 2, and is thus ready to be drawn to the locality at which the loading is to start. As the scraper bowl is retained elevated above the surface of the ground and as the weight of the implement is carried by the traction Wheels, the scraper may be rapidly transported to the loading locality. When the loading locality is reached, the operator actuates the control lever 52 by means of rope 61, whereupon due to the Weight of bowl 22 and the action of springs 58 the bowl will be lowered into the scraping or loading position, as illustrated in Fig. 3. During the lowering of the bowl due to the mounting of the movable stops upon the lifting arms, the cutting blade 27 of the bowl will be rotated or tilted downwardly in a clockwise direction into cutting angle. As the scraper is drawn along, a load is gradually accumulated in the scraper bowl.

After the scraper bowl has accumulated the desired load, the operator may cause the bowl to be elevatedinto the dragging position, as illustrated in Fig. 2, or to the carrying position, as illustrated in Fig. 4.

To elevate the bowl into the dragging position of Fig. 2, the control lever 52 will. be actuated to Withdraw bolt 48 from the sliding draw-bar notch 51 and then immediately released in order that the bolt may enter notch 50. draw-bar represented by the distance between notches 50 and 51 will act through link 18. levers 16 and 20, and through link 21 to lift the forward end of lifting arms 11. By positioning the bowl latching means upon the forward ends of the lifting arms, the bowl will be rotated'in a counter-clockwise direction, as viewed in the drawings, during thelifting operation. One of the principal The movement of the sliding advantages resulting from elevating the bowl to the dragging position instead of to the carrying position is that a greater amount of dirt may be moved, because with the scraper in dragging position the large pile of dirt which has accumulated in front of the scraper bowl during the loading operation, as illustrated at 63 in Fig. 2, will be retained and dragged along to the dumping locality.

The scraper bowl may be lifted directly into carrying position from the scraping position by actuating the control lever 52 to release bolt 48 from notch 51 and retaining the control lever actuated until the notch 50 has moved beyond bolt 48. Upon the re lease of the actuating lever, the bolt may ride upon the upper edge of the sliding draw-bar so as to allow the control means to float, or a-third notch, as indicated at 62 in Fig. 4, may be provided to positively lock the bowl in carryin position.

With the bowl elevated to carrying position, the entire weight of the load is divided between wheels 2 and the draft means, and may be more rapidly moved to the dumping locality. When long hauls are to be made, it is preferable to lift the scraper bowl into carrying position. As will be noted from Fig. 4, the cutting edge 27 of the bowl has not only been elevated considerably above the ground, but has simultaneously been rotated in a counter-clockwise direction when viewed in this figure to incline the cutting edge together with the bottom of the bowl above the horizontal for two important reasons; the first being to retain the accumulated load within the bowl, and the second to enable the scraper to float or ride over an embankment or levee instead of cutting a path therethrough, as would be the case if the scraper were locked in dragging position.

Whether the scraper bowl is retained in the dragging or the carrying position, the operator may cause the load to be spread or dumped in a pile upon arrival at the dumping locality. To spread the load, the operator actuates the release lever 28 by means of rope 45 to disrupt the toggle lock, whereupon the thrust of the bowl stops 25 upon the lugs 42 of the swinging latch 37 completes the releasing operation. As soon as the bowl stops have cleared the lugs, the swinging latches are returned by the action of spring-46 to their locking position, and the toggle locking effect is again set up. The rotation of the bowl brings the spreading stops 26 into locking engagement with the stop lugs to retain the bowl in spreading position. To dump the load in a pile, the re lease lever 28 is actuated and retained in its actuated position until after the spreading stops 26 have cleared the stop lugs 42, thus permitting the bowl to make a complete revolution. After the load is disposed of, the implement is returned to the loading locality where the control lever 52 is actuated to release the draw-bar, which is drawn in to the implement due to the cifect of springs 58 and the weight of the empty bowl and because with. an empty machine the draft is light.

Having fully described the preferred embodiment of the invention, it is to be understood that it is not to be limited to the details herein set forth, but the invention is of the full scope of the appended claims.

o claim:

1. In a scraper, a frame, traction wheels join-nailed upon the rear end of said frame, a pair of lifting arms pivotally mounted upon opposite sides of said frame, means including a sliding draw-bar for actuating said lifting arms, a scraper bowl rotatably mounted upon said lifting arms int rmediale the ends thereof, stop brackets carried by said bowl, and a movable stop means operatively mounted upon said lifting arms and pos'tioned to engage the bowl stop brackets.

2. In a scraper, a frame, traction wheels j ournaled upon the rear end of said frame, a pair of lifting arms pivotally mounted upon opposite sides of said frame, means includinga sliding draw-bar for actuating said liftir arms, a scraper bowl rotatably mounted upon said l fting arms intermediate the ends thereof, stop brackets carried by s; id bowl, a movable stop means operatively mounted upon said lifting arms and positioned to enthe bowl stop brackets, and means for actuating the movable stop means for removing said stops from engagement with saic bowl stop brackets to free the bowl for rotation.

3. In a scraper, a frame, traction wheels journaled upon the rear end of said frame, a pair of l f ting arms pivotally mounted upon. opposite sides of the frame, means ineluding a sliding draw-bar for actuating said lifting arms, a releasable locking means for the aforesaid means for actuating said lifting arms, a scraper bowl rotatably mount ed upon said lifting arms intermediate the ends thereof, stop brackets carried by said bowl, and a movable stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets.

4:. In a scraper, a frame, traction wheels journaled upon the rear end of said frame, a pair of lifting arms pivotally mounted upon opposite sides of the frame. means includ ng a sliding draw-bar for actuating said lifting arms, a releasable locking means for the aforesaid means for actuating said lifting arms, a scraper bowl rotatably mounted upon said lifting arms intermediate the ends thereof, stop brackets carried by said bowl, a movable stop means operativcly mounted upon said lifting arms and positioned to engage the bowl stop brackets, and means for actuating the movable stop means for removing said stops from engagement with said bowl stop brackets to free the bowl for rotation.

5. In a scraper, a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivoially mounted upon opposite sides of the frame, means including a sliding draw-bar for actuating said lifting arms, a spring means for yieldingly resist ing the action of the aforesaid means, a scraper bowl rotatably mounted upon said lift ng arms at a mint spaced from the mounting of said arms upon said frame, stop brackets carried by said bowl, and a movable slop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets.

6. In a scraper, a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms p'votally mounted upon opposite sides of the frame, means including a sliding draw-bar for actuating said lifting arms. a spring means for yieldingly resisting the action of the aforesa d means, a scraper bowl. rotatably mounted upon said lifting arms at a point spaced from the mounting of said arms upon said frame, stop brackets carried by said bowl, a movable stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets, and means for actuating the movable stop means for removing said stops from engagement with sa d bowl stop brackets to free the bowl for rotation.

7. In a scraper, a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted upon opposite sides of the frame, means including a sliding draw-bar for actuating said lifting arms, a spring means for yieldingly resisting the action of the aforesaid means, a releasable locking means for the aforesaid means for actuating said lifting arms, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from the mounting of said arms upon said frame, stop brackets carried by said bowl, and a movable stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets.

8. In a scraper, a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted upon opposite sides of the frame, means including a sliding draw bar for actuating said lifting arms, a spring means for yieldingly resisting the action of the aforesaid means, a releasable locking means for the means for actuating said lifting arms, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from the mounting of said arms upon said frame, stop brackets carr ed by said bowl, a movable stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets,

and means for actuating the movable stop means for removing said stops from engagement with said bowl stop brackets to free the bowl for rotation.

9. A scraper including a frame, traction wheels supporting the rear end of said frame, a draw-bar slidably mounted in the forward end of the frame, a spring for yieldingly resisting outward movement of the drawbar, a releasable locking means operable for locking said sliding draw-bar in either its extended or retracted positions, a pair of lifting arms pivotally mounted at their rear ends upon the frame, means for operatively connecting the forward ends of said lifting arms with said draw-bar, a scraper bowl rotatably mounted upon said lifting arms, stop brackets carried by said bowl, and a movable stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets.

10. A scraper including a frame, traction wheels supporting the rear end of said frame, a draw-bar slidably mounted in the forward end of the frame, a spring for yieldingly resisting outward movement of the draw-bar, a releasable locking means operable for look ing said sliding draw-bar in either its extended or retracted positions, a pair of lifting arms pivotally mounted at their rear ends upon the frame, means forioperatively connecting the forward ends of said lifting arms with said draw-bar, a scraper bowl rotatably mounted upon said lifting arms, stop brackets carried by said bowl, a movable stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets, and means for actuating said movable stops out of engagement with said bowl stops to free the bowl for rotation.

11. A scraper including a frame, tractlon wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted to said frame, means including a sliding drawbar for actuating said lifting arms, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from the pivotal mounting of said arms to said frame, stops carried by said bowl, a stop means operatively mounted upon said lifting arms and positioned to engage the bowl stop brackets, means including a toggle lock for retaining said stop means in locking position, and means for disrupting said toggle and for actuating said stop means out of engagement with said bowl stop brackets to free said scraper bowl for rotation.

12. A scraper including a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted to said frame, means including a sliding drawbar for actuating said lifting arms, a releasable locking means for the aforesaid means, a scraper bowl rotatably mounted upon said lifting arms, stops carried by said bowl, a stop, means operatively mounted upon said, lifting arms and positioned to engage the bowl stop brackets, and means including a toggle lock for retaining said stop means in looking position, and means for disrupting said toggle and for actuating said stop means out of engagement with said bowl stop brackets to free the bowl for rotation.

13. A. scraper including a frame, traction wheelssupporting the rear end of said frame, apair of lifting arms pivotally mounted to said frame, means including a sliding drawbar for actuating said lifting arms, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from said pivotal mounting, stops carried by said bowl, a swinging latch means mounted upon said lifting arms and positioned to be engaged and rotated by said bowl stops, means including a toggle lock for retaining said latch means 5 against rotation, and means for disrupting said toggle to release said latch means where by said bowl stops will rotate said latch means out of locking engagement therewith.

14:. A scraper including a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted to said frame, means including a sliding drawbar for actuating'said lifting arms, a releasable locking means for the draw-bar, a scraper bowl rotatably mounted upon said lifting arms at a, point spaced from said pivotal mounting, stops carried by said bowl, a swinging latch means operatively mounted upon said :ifting arms, and positioned to be engaged and swung into disengaging position by said bowl stops, means including a toggle lock for retaining saidswinging latch means in looking position, and means for disrupting said toggle to release said swinging latch means so that said latch means may be swung into the disengaging position by said bowl stops.

15. A scraper including a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted to said frame, means including a sliding drawbarfor actuating said lifting arms, a releasable locking means for the draw-bar, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from said pivotal mounting, stops carried by said bowl, a swinging latch means operatively mounted upon said lifting arms and positioned to be engaged and swung into disengaging position by said bowl stops, means including a toggle lock for retaining said swinging latch means in looking position, and means for disrupt: ing said toggle to release said swinging latch means so that said latch means may be swung into the disengaging position by said bowl stops, and means for returning said swinging latch means into engaging position and for reestablishing said toggle lock.

16. A scraper including a frame, traction wheels supporting the rear end of said frame, a pair of lifting armspivotally mounted upon opposite sides of said frame, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from said pivotal mounting, stop brackets carried by said bowl, a movable stop means operatively mounted upon said lifting arms and positioned to engage said bowl stop brackets, means including a sliding draw-bar for actuating said lifting arms, and means for releasably locking the sliding draw-bar to retain the scraper bowl in either a scraping, dragging or carrying position.

17 A scraper including a frame, traction wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted upon opposite sides of said frame, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from said pivotal mounting, stop brackets carried by said bowl, a movable stop means operatively mounted upon said lifting arms and positioned to engage said bowl stop brackets, a draft means operatively mounted in said frame for actuating said lifting arms, and a control means operable for locking said draft means for retaining said scraper bowl in either a scraping or a dragging position and also operable for releasing said draft means for elevating and floatingly retaining said scraper bowl in a carrying position.

18. A scraper including a frame, wheels supporting the rear end of said frame, a pair of lifting arms pivotally mounted upon oppoite sides of said frame, a scraper bowl rotatably mounted upon said lifting arms at a point spaced from said pivotal mounting, stop brackets carried by said bowl, a movable stop means operatively mounted upon said lifting arms and positioned to engage said bowl stop brackets, a draft means operatively mounted in said frame for actuating said lifting arms, a spring means for resisting the action of said draft means, and a control means operable for locking said draft means for retaining said scraper bowl in either a scraping or a dragging position and also operable for releasing said draft means for elevating and floatingly retaining said scraper bowl in a carrying position.

Signed at Los Angeles, Calif, this 5th day of July, 1932.

OSCAR W. SJOGREN. JESSE A. VAUGHN. 

